You know what? I didn't like Arcee," the filmmaker revealed exclusively to us Thursday night, "so I kill her later, all right?"

"You know what? It's like actors," he explained, comparing his Transformers to flesh-and-blood stars Shia LaBeouf and Megan Fox. "There are certain actors that blossom on screen, and there are certain others where you're like, 'Yuck, I'm cutting them out of the movie.'"

"This isn't sad," he grinned, discussing Arcee's sudden death. "This is just 'get it out and get it over with.' "

Bay also shot down the long-simmering rumor that Fox will be seen riding Arcee and doing some female bonding with the character. "No," he insisted. "She has nothing to do with Megan."